Cushion and method of use

ABSTRACT

A cushion for inserting in the legwell between individual seats in rows of seats, for example in a vehicle, is disclosed. The top of the cushion can act as a surface for a user to lie down. The cushion can be inflatable and can be deflated for easy transport. The cushion can have multiple reservoirs so the internal pressure can be separately adjusted for the base and for the mattress of the cushion, similar to a box spring and a mattress in a common bed.

CROSS-REFERENCE To RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.14/309,094 filed Jun. 19, 2014, which claims the benefit of U.S.Provisional Application No. 61/836,851 filed Jun. 19, 2013, each ofwhich is herein incorporated by reference in its entirety.

BACKGROUND

1. Technical Field

A cushion for use between seats on a vehicle and a method of using thesame is disclosed. For example, the cushion can be positioned in thelegwell between a first seat and a second seat in the row immediately infront of the first seat on an airplane and be laid upon by a passenger.

2. Description of Related Art

Airplane, train and car travel over long distances can be physicallyuncomfortable, especially for younger passengers accustomed to movingaround more than allowed on cars and in planes. Sleeping helps pass thetravel time for such passengers, but often the seats do not sufficientlyrecline to make sleep comfortable, the seats are too uncomfortable(e.g., hard or rough), dirty, the armrest between adjacent seats can notbe raised to allow the passenger to lie down across the seats, or theadjacent seat is occupied by another passenger preventing thesleep-desiring passenger from lying across the two seats.

There exist cushions to fill the space in the legwell between the frontof the passenger's seat and the back of the next seat forward. However,some of these cushions are rigid, providing an uncomfortable experience.Some also extend to cover the seat, making the entire assemblyunnecessarily large, making transport of the cushions even moredifficult considering the awkward contortions needed to transit anairport and board and exit a crowded plane, as well as getting into andout of the legwell space in a car or tram. The existing inflatablecushions have a single bladder in the legwell area, reducing the abilityto adjust the pressure at different locations in the cushion in thelegwell, similarly to a bed with a stiffer bottom box spring and asofter top mattress.

Accordingly, a cushion for filling the space in the legwell betweenseats in adjacent rows is desired that is soft, does not cover the seat,and can be adjusted to different levels of softness and rigidity atdifferent heights is desired.

SUMMARY OF THE INVENTION

An inflatable cushion is disclosed. The cushion can have a flexible wallthat can define a first reservoir (e.g., a mattress reservoir) and asecond reservoir e.g., a base reservoir), a first closable valve, and asecond closable valve. The flexible wall can have an external wall and aseptum separating the first reservoir and the second reservoir.

The first closable valve can be in fluid communication with the firstreservoir and the outside environment. The second reservoir can be influid isolation from the first reservoir. The second closable valve canbe in fluid communication with the first reservoir and the outsideenvironment.

When the first reservoir and the second reservoir are in inflatedconfigurations the external surface of the wall adjacent to the firstreservoir and opposite to the second reservoir can be flat. The externalsurface of the wall adjacent to the second reservoir and opposite to thefirst reservoir can be flat and parallel to the external surface of thewall adjacent to the first reservoir and opposite to the secondreservoir. For example, the top of the mattress reservoir's top wall canbe flat and parallel to the bottom of the base reservoir's bottom wall.

When the first reservoir and the second reservoir are in inflatedconfigurations, the first reservoir can have a first reservoir centralaxis and the second reservoir can have a second reservoir central axis.The first reservoir central axis can be collinear with the secondreservoir central axis when the reservoirs are in inflatedconfigurations.

The first reservoir can be above the second reservoir when positionedfor use. The second reservoir can be narrower and/or shorter than thefirst reservoir.

Either or both reservoirs can have cells in fluid communication witheach other and the respective reservoir. The cells can be surrounded byinternal tensile cell walls attached to the external wall and the septumThe cell walls can provide tension to the external wall when therespective reservoir is inflated to maintain a desired shape of therespective sub-cushion (e.g., a flat top or bottom). When the respectivereservoirs are in inflated configurations, the cell walls can be intension between the septum and the respective external wall.

The cushion can have a heater and/or a cooler.

The cushion can have a third reservoir (e.g., a pillow reservoir)extending from the first reservoir in a direction away from the secondreservoir. The third reservoir can be in fluid isolation from or fluidcommunication with the first and/or second reservoirs.

A method of using a cushion in the legwell between a first seat and asecond seat in a vehicle is disclosed. The cushion can have aninflatable mattress reservoir and an inflatable base reservoir. Themethod can include inflating the base reservoir to a first pressure,positioning the cushion between the first seat and the second seat afterthe base reservoir is inflated, and inflating the mattress reservoir toa second pressure. After inflating the mattress reservoir, the cushionmay not extend onto the first seat.

The method can include applying pressure with the mattress reservoir ina first direction (e.g., rearward) to a seat pad of the first seat andin a second direction (e.g., forward) to a seat back of the second seat.The mattress reservoir can be held in tension between the seat pad ofthe first seat and the seat back or backrest of the second seat. Thefirst direction can be the opposite of the second direction.

The cushion can be positioned before the mattress reservoir is inflated.The cushion can be positioned after the mattress reservoir is inflated.

The first seat can be directly behind the second seat.

The first pressure can be greater than, equal to or less than the secondpressure.

Also disclosed is a method for using a cushion system for a vehiclepassenger. The method can include positioning a first legwell cushion ina first legwell of a first seat and second legwell cushion in a secondlegwell of a second seat. The first legwell can be adjacent to thesecond legwell. The method can also include laying a first passengeracross the first cushion and the second cushion.

The method can also include rotating armrests attached to the firstand/or second seat out of the way, and laying a second passenger acrossthe first and second seats.

BRIEF DESCRIPTION OF THE FIGURES

FIGS. 1a and 1b illustrate variations of the cushion.

FIG. 2 is a variation of sectional view A-A of the cushion of FIG. 1 a.

FIG. 3 illustrates a variation of a method for positioning the cushionbetween seats in adjacent rows.

FIGS. 4 and 5 illustrate variations of methods for using the cushion.

DETAILED DESCRIPTION

Figures la and lb illustrate a cushion or pillow that can be used incombination with a chair, sofa or seat. The cushion can have a cushionwall that can be impermeable to air or other gasses or fluids, orcombinations thereof. The cushion wall can be made from a flexiblematerial, such as a fiber-reinforced plastic such as PVC vinyl polymer.The material can be bare and/or coated in all or part of the outside ofthe cushion with a low-friction material such as felt, velvet, silk,satin, cotton, or combinations thereof.

The cushion can have one or more sub-cushions, for example a mattresssub-cushion and a base sub-cushion. The sub-cushions can befluid-tillable and inflatable reservoirs or bladders, For example, thesub-cushions can be filled with air, carbon dioxide, water, salinesolution, nitrogen, gel, or combinations thereof. One or both of thesub-cushions can be filled with one or more foams without or incombination with a fluid. The sub-cushions can be in fluid communicationwith each other or can be not in fluid communication with each other,for example having separate and distinct reservoirs. The mattresssub-cushions can be at the top end of the cushion.

The sub-cushions can each have generally square or rectangularfootprints with curved or rounded corners. When the sub-cushions are inan inflated configuration, the top surface of the mattress sub-cushioncan be substantially flat, and the bottom surface of the basesub-cushion can be flat and parallel to the top of the mattresssub-cushion.

When in an inflated configuration and unbiased, the mattress sub-cushioncan have a mattress width, mattress length, and mattress height. Themattress width at the wisest portion of the mattress sub-cushion can be,for example, from about 30 cm to about 60 cm, more narrowly from about45 cm to about 50 cm, for example about 47 cm. The mattress length atthe longest portion of the mattress sub-cushion can be from about 20 cmto about 50 cm, more narrowly from about 35 cm to about 40 cm, forexample about 38 cm. The mattress length can be equal to the mattresswidth. The mattress height can be from about 5 cm to about 30 cm, morenarrowly from about 1.0 cm to about 20 cm, for example about 15 cm.

When in an inflated configuration and unbiased, the base sub-cushion canhave a base width, base length, and base height. The base width at thewidest portion of the base sub-cushion can be, for example, from about10 cm to about 60 cm, more narrowly from about 25 cm to about 30 cm, forexample about 28 cm. The base length at the longest portion of the basesub-cushion can be from about 10 cm to about 60 cm, more narrowly fromabout 25 cm to about 30 cm, for example about 28 cm. The base length canbe equal to the base width, The base height can be from about 10 cm toabout 50 cm, more narrowly from about 25 cm to about 30 cm, for exampleabout 27 cm.

The base length and/or base width can be equal to, larger than orsmaller than the mattress length and/or mattress width, respectively.

The mattress sub-cushion (as shown) and/or base sub-cushion can have oneor more tension cells. The tension cells can hold the top and/or bottomexternal wall in a substantially flat configuration when the respectivesub-cushion is inflated. The walls of the cells can be attached to theexternal walls of the respective sub-cushions at cell seams.

The base sub-cushion can have a foot at the bottom terminal end of thebase sub-cushion opposite the mattress sub-cushion The base can narrowin width and/or length adjacent to the foot. The remainder of the basesub-cushion can adjoin to the foot at a foot juncture ridge is narrowerin length and width than the remainder of the base sub-cushion. The footcan expand in width and/or length extending downward from the footjuncture ridge.

The mattress sub-cushion can have a mattress valve and the basesub-cushion can have a base valve. The valves can be openable andclosable and can be pulled away from and pushed into a recessed positionin the respective sub-cushions, lying flat and flush against thesub-cushion external wall. When opened, the respective reservoirs can bein fluid communication with the outside environment through therespective valve. For example, a user can open the valve and pressurizeor depressurize the respective reservoir (e.g., with a pump or byblowing through the valve) and then close the valve.

The external wall on the top of the mattress sub-cushion and/or on thebottom of the base reservoir can have a foam, and/or liquid, and/or gelpadding.

FIG. 1b illustrates that the base sub-cushion can have a base mid-seam.The mid-seam can circumscribe the base sub-cushion. The mid-seam canextend outward from the remainder of the base sub-cushion and can have ahigher coefficient of friction than the surrounding base sub-cushion.For example, the mid-seam can frictionally secure cargo stowed in theunderseat storage volumes in front of the cushion, and/or frictionallysecure the cushion to the seat pad or frame of the user's active seat.

One or both of the sub-cushions can have temperature control elementssuch as heaters and/or coolers, For example, the top wall of themattress sub-cushion can have one or more resistive heating coils and/orthermoelectric Peltier cooling strips (that can be used as heatersand/or coolers) embedded in the wall. The heating coils and/or Peltiercoolers can be powered by replaceable and/or rechargeable batteries in ahard case on the side of the cushion and/or by a detachable or fixedelectrical cord extending from the wall of the cushion. The heatersand/or coolers can have a control for power, both to turn the power onand off and/or to adjust the amount of heat produced by the heaters andcooling produced by the coolers. The controls can include a thermostatto turn the heaters and/or coolers on and off or dynamically adjust thequantity of heat output or cooling output to maintain a constanttemperature of the top surface of the cushion as defined by atemperature control set by the user. The top surface of the cushion canhave a thermometer. The thermometer can sense the temperature of the topsurface of the cushion and can communicate the temperature of the topsurface of the cushion to the thermostat.

FIG. 2 illustrates that the cushion wail can have an external wall, aseptum, and internal cell walls defining, for example, a first cell anda second cell.

When the cushion is in an inflated configuration, the cell walls can bein tension between the top external wall of the mattress sub-cushion andthe septum. The cells can be in fluid communication with the remainderof the mattress reservoir. For example, the cell walls can have holes orcan be otherwise fluid permeable. The cell walls can be fluidimpermeable and the cells can be inflated to individual openable andcloseable cell valves (not shown) through the external wall.

The external wall and the septum can define a mattress reservoir. Themattress reservoir can be filled and pressurized or emptied anddepressurized with a fluid through the mattress valve.

The external wall and the septum can define a base reservoir on theopposite side of the septum from the mattress reservoir. The basereservoir can be filled and pressurized or emptied and depressurizedwith a fluid through the base valve

The septum can separate the base reservoir from the mattress reservoir.The base reservoir can be separate, distinct and not in fluidcommunication with the mattress reservoir. The septum can be fluidimpermeable. The mattress reservoir can be filled with fluid to amattress reservoir pressure. The base reservoir can be filled with fluidto a base reservoir pressure. The mattress reservoir pressure can be thesame as, less than or more than the base reservoir pressure.

The mattress reservoir can be in fluid communication with the basereservoir. For example, the septum can instead be fluid permeable, forexample having holes.

When in an inflated configuration, the mattress reservoir can have avertical central axis and the base reservoir can have a vertical centralaxis. The vertical central axis of the mattress reservoir can becollinear with the vertical central axis of the base reservoir.

FIG. 3 illustrates that the cushion can be positioned in the legwellbetween an active seat (i.e., the rear seat) and a direct adjacent,forward-adjacent seat (i.e., the front seat or bulkhead) to the activeseat. The forward-adjacent seat can be in a row of seats in front of arow of seats in which the active seat resides. A passenger using thecushion can be assigned to or seated in the active seat before thecushion is inflated and positioned between the adjacent seats.

The seats can have seat pads that can be horizontal or at a small angleto the horizontal, backrests and/or seatbacks that can be vertical or ata small angle to the vertical, armrests, or combinations thereof. Thearmrests can separate the seating between directly adjacent side-by-sideseats. The armrest can be rotatable out of the way of the seating (i,e.,rotated to a position where the length of the armrest will be locatedbetween adjacent side-by-side seats' backrests).

The space directly under the seats and within the underside supportframe of the seat can be the footwell or standard underseat storagevolume. The standard underseat storage volume can be accessible to theuser seated in the seat behind the respective standard underseat storagevolume. When the cushion is positioned and inflated as shown in FIG. 3,the from of the cushion can segregate additional volume, an extendedunderseat storage, behind the standard underseat storage volume.

The seat pad can have a seat pad maximum height plane extending from thehighest point on the seat pad. The seat pad maximum height plane canextend at a seat pad maximum height from the floor. When inflated, thecushion can have a cushion height. The cushion height can be less thanor equal to the seat pad maximum height.

The base reservoir, e.g., and thus the base sub-cushion, can be inflatedbefore, concurrent with, or after positioning the cushion on the floorbetween the active seat and the forward-adjacent seat. The mattressreservoir, e.g., and this the mattress sub-cushion, can be inflatedbefore, concurrent with, or after positioning the cushion on the floorbetween the active seat and the forward-adjacent seat, and before,concurrent with, or after inflating the base reservoir.

When the mattress sub-cushion is inflated and positioned between theactive seat and the forward-adjacent seat, the mattress sub-cushion canbe spaced from the active seat and/or the forward adjacent seat, or candeform and be biased around the surface of the backrest of theforward-adjacent seat and/or around the front of the seat pad of theactive seat. The mattress sub-cushion can be squeezed between and applyforward pressure to the rear of the backrest of the forward-adjacentseat and rearward pressure to the front of the seat pad of the activeseat, for example securing the mattress sub-cushion between the rear ofthe forward-adjacent seat's backrest and the front of the active seat'sseat pad.

The highest point or highest line at which the mattress sub-cushioncontacts the seat pad can be the seat contact high point (which can alsobe the seat contact high line). The seat contact high point can be lowerthan the highest cushion height (as shown) or can be coplanar with thehighest cushion height (e.g., if there is no dip or divot at thelocation where the top of the cushion surface contacts the seat pad,forming a smooth transition from the seat pad to the top of thecushion).

FIG. 4 illustrates that the cushion can be positioned and inflated inthe legwell between the front of the seat pad and behind the bulkhead(or a forward-adjacent seat). The user, such as a vehicle passengerassigned to the active seat, can lie along a longitudinal axis of theseat and/or vehicle on the seat pad and the top of the cushion.

FIG. 5 illustrates that a first cushion can be positioned and inflatedin the legwell between the front of a first seat pad of a first seat andthe bulkhead (or a forward-adjacent seat). A second cushion can bepositioned and inflated in the legwell between the front of a secondseat pad of a second seat and the bulkhead (or a forward-adjacent seat).The first seat and the second seat can be directly adjacentside-by-side. The user can lie along a lateral or transverse axis of theseats along the first and second cushions.

The pressure in the mattress reservoir can be increased and decreased toa satisfactory firmness for the user. The pressure in the mattressreservoir can also be increased or decreased to fit the mattresssub-cushion between the active seat and forward-adjacent seat (orbulkhead), for example with sufficient pressure to friction fit themattress sub-cushion between the active seat and the forward adjacentseat.

The armrest(s) can be rotated out of the way of the seat pads, forexample positioning the length of the armrest between the first seat'sbackrest and the second seat's backrest. A first user can lie along thetransverse axis of the cushions (as shown in FIG. 5), and a second usercan concurrently lie along the transverse axis of the first seat pad andthe second seat pad.

A pillow sub-cushion (not shown) can be attached to or integral with andextend upward from the top of the mattress sub-cushion on one side ofthe central axis. The pillow sub-cushion can have a pillow reservoir influid communication with a pillow valve, similar to the valves describedabove. The pillow reservoir can be inflated and deflated separately fromthe mattress and base sub-cushions to the same or a different pressureas the mattress reservoir. The pillow reservoir can be in fluidcommunication with or isolation from the mattress reservoir.

It is apparent to one skilled in the art that various changes andmodifications can be made to this disclosure, and equivalents employed,without departing from the spirit and scope of the invention. Elementsshown with any embodiment are exemplary for the specific embodiment andcan be used in combination with or otherwise on other embodiments withinthis disclosure.

I claim:
 1. An inflatable cushion comprising: a flexible wall defining afirst reservoir and a second reservoir, wherein the flexible wallcomprises an external wall and a septum separating the first reservoirand the second reservoir, a first closable valve in fluid communicationwith the first reservoir and the outside environment; and a secondclosable valve in fluid communication with the second reservoir and theoutside environment, wherein the first reservoir is m fluid isolationfrom the second reservoir, wherein when the first reservoir and thesecond reservoir are in inflated configurations, a first externalsurface of the wall adjacent to the first reservoir and opposite to thesecond reservoir is flat, and a second external surface of the walladjacent to the second reservoir and opposite to the first reservoir isflat and parallel to the first external surface; wherein at least aportion of the first external surface extends continuously from a firstlateral terminal end of the first reservoir to a second lateral terminalend of the first reservoir and continuously from a first longitudinalterminal end of the first reservoir to a second longitudinal terminalend oaf the first reservoir along the lateral extent of the firstexternal surface of the flexible wall defining the first reservoir,wherein at least a portion of the second external surface extendscontinuously from a first lateral terminal end of the second reservoirto a second lateral terminal end of the second reservoir andcontinuously from a first longitudinal terminal end of the secondreservoir to a second longitudinal terminal end of the second reservoiralong the lateral extent of the second external surface of the flexiblewall defining the second reservoir, wherein the first closable valve ison a first reservoir terminal end of a first longitudinal side of thefirst reservoir, wherein the second closable valve is on a secondreservoir terminal end of the first longitudinal side of the secondreservoir, wherein when the first reservoir and the second reservoir arein inflated configurations, the first reservoir has a first reservoircentral axis and the second reservoir has a second reservoir centralaxis, and wherein the first reservoir central axis is collinear with thesecond reservoir central axis, wherein the first reservoir is configuredto be above the second reservoir when the second external surface ispositioned against a floor, wherein when the first reservoir is in aninflated configuration, the first reservoir has a first reservoirlength, a first reservoir width, and a first reservoir height, whereinwhen the second reservoir is in an inflated configuration, the secondreservoir has a second reservoir length, a second reservoir width, and asecond reservoir height, wherein the first reservoir length is greaterthan the second reservoir length, wherein the first reservoir width isgreater than the second reservoir width, wherein the first reservoirheight is less than the second reservoir height, wherein when the firstreservoir and the second reservoir are in inflated configurations theinflatable cushion has a cushion height from 15 cm to 80 cm, whereinwhen the first reservoir and the second reservoir are in inflatedconfigurations, the first external surface is rectangular with roundedcorners and the second external surface is rectangular with roundedcorners, wherein the first reservoir has three cells defined by threecorresponding internal walls, wherein the three internal walls areattached to the septum and to the external wall forming the firstexternal surface, wherein the three internal walls are attached to theexternal wall forming the first external surface at three correspondingcell seams, wherein each cell seam is rectangular with rounded corners,wherein at least a portion of each cell seam extends from a firstlateral side of the first reservoir to a second lateral side of thefirst reservoir and from the first longitudinal side of the firstreservoir to a second longitudinal side of the first reservoir, whereinthe second reservoir has a reservoir seam that circumscribes the secondexternal surface, wherein the second closable valve is on a thirdexternal surface of the wall on the second reservoir terminal end of thefirst longitudinal side of the second reservoir, wherein the thirdexternal surface of the wall extends between the reservoir seam and thefirst reservoir, wherein when the first reservoir is in an inflatedconfiguration, the internal walls are in tension between the septum andthe external wall forming the first external surface, wherein theflexible wall comprises polyvinyl chloride (PVC), and wherein a firstexternal surface material is coated on at least a portion of the firstexternal surface.
 2. The cushion of claim 1, wherein the first externalsurface material is a low friction material.
 3. The cushion of claim 1,wherein the first external surface material is felt, velvet, silk,satin, cotton, or combinations thereof.
 4. The cushion of claim 1,wherein at least two of the cells are in fluid communication with oneanother.
 5. The cushion of claim 1, wherein at least one of the internalwalls is fluid permeable.
 6. The cushion of claim 1, wherein the cushionheight is from 35 cm to 50 cm.
 7. The cushion of claim 1, furthercomprising at least one of a heater and a cooler.
 8. The cushion ofclaim 1, further comprising a third reservoir extending from the firstreservoir and in fluid isolation from the first and second reservoirs.9. A method of using the inflatable cushion of claim 1 in the legwellbetween a first seat and a second seat in a vehicle, the methodcomprising: inflating the base reservoir to a first pressure;positioning the inflatable cushion between the first seat and the secondseat after the second reservoir is inflated; and inflating the firstreservoir to a second pressure; wherein after inflating the firstreservoir, the cushion does not extend onto the first seat; and whereinthe second reservoir is below the first reservoir after the inflatablecushion is positioned.
 10. The method of claim 9, wherein thepositioning of the cushion occurs before the mattress reservoir isinflated.
 11. The method of claim 9, wherein the positioning of thecushion occurs after the mattress reservoir is inflated.
 12. The methodof claim 9, wherein at least a first portion of the inflatable cushioncontacts a portion of the first seat and at least a second portion ofthe inflatable cushion contacts a portion of the second seat when thefirst reservoir and the second reservoir are in inflated configurations.13. The method of claim 9, wherein the first pressure is greater thanthe second pressure.
 14. The method of claim 9, wherein the firstpressure is less than the second pressure.
 15. The method of claim 9,further comprising rotating an armrest attached to the first and/orsecond seat, and laying a second passenger across the first and secondseats.
 16. An inflatable cushion comprising: a flexible wall defining afirst reservoir and a second reservoir, wherein the flexible wallcomprises an external wall and a septum separating the first reservoirand the second reservoir; a first closable valve in fluid communicationwith the first reservoir and the outside environment; and a secondclosable valve in fluid communication with the second reservoir and theoutside environment, wherein the first reservoir is in fluid isolationfrom the second reservoir, wherein when the first reservoir and thesecond reservoir are in inflated configurations, a first externalsurface of the wall adjacent to the first reservoir and opposite to thesecond reservoir is flat, and a second external surface of the walladjacent to the second reservoir and opposite to the first reservoir isflat and parallel to the first external surface; wherein at least aportion of the first external surface extends continuously from a firstlateral terminal end of the first reservoir to a second lateral terminalend of the first reservoir and continuously from a first longitudinalterminal end of the first reservoir to a second longitudinal terminalend of the first reservoir along the lateral extent of the firstexternal surface of the flexible wall defining the first reservoir,wherein at least a portion of the second external surface extendscontinuously from a first lateral terminal end of the second reservoirto a second lateral terminal end of the second reservoir andcontinuously from a first longitudinal terminal end of the secondreservoir to a second longitudinal terminal end of the second reservoiralong the lateral extent of the second external surface of the flexiblewall defining the second reservoir, wherein the first closable valve ison a first reservoir terminal end of a first longitudinal side of thefirst reservoir, wherein the second closable valve is on a secondreservoir terminal end of the first longitudinal side of the secondreservoir, wherein when the first reservoir and the second reservoir arein inflated configurations, the first reservoir has a first reservoircentral axis and the second reservoir has a second reservoir centralaxis, and wherein the first reservoir central axis is collinear with thesecond reservoir central axis, wherein the first reservoir is configuredto be above the second reservoir when the second external surface ispositioned against a floor, wherein when the first reservoir is in aninflated configuration, the first reservoir has a first reservoirlength, a first reservoir width, and a first reservoir height, whereinwhen the second reservoir is in an inflated configuration, the secondreservoir has a second reservoir length, a second reservoir width, and asecond reservoir height, wherein the first reservoir length is greaterthan the second reservoir length, wherein the first reservoir width isgreater than the second reservoir width, wherein the first reservoirheight is less than the second reservoir height, wherein when the firstreservoir and the second reservoir are in inflated configurations theinflatable cushion has a cushion height from 15 cm to 80 cm, whereinwhen the first reservoir and the second reservoir are in inflatedconfigurations, the first external surface is rectangular with roundedcorners and the second external surface is rectangular with roundedcorners, wherein the first reservoir has six internal walls, wherein thesix internal walls are attached to the septum and to the external wallforming the first external surface, wherein the six internal walls areattached to the external wall forming the first external surface at sixcorresponding internal wall seams, wherein each internal wall seamextends from a first lateral side of the first reservoir to a secondlateral side of the first reservoir, wherein the second reservoir has areservoir seam that extends around a circumference of the secondreservoir, wherein the second closable valve is on a third externalsurface of the wall on the second reservoir terminal end of the firstlongitudinal side of the second reservoir, wherein the third externalsurface of the wall extends between the reservoir seam and the firstreservoir, and wherein when the first reservoir is in an inflatedconfiguration, the internal walls are in tension between the septum andthe external wall forming the first external surface.
 17. The cushion ofclaim 1, wherein the cushion height is from 35 cm to 50 cm.
 18. Thecushion of claim 1, further comprising at least one of a heater and acooler.
 19. The cushion of claim 1, further comprising a third reservoirextending from the first reservoir and in fluid isolation from the firstand second reservoirs.
 20. An inflatable cushion comprising: a flexiblewall defining a first reservoir and a second reservoir, wherein theflexible wall comprises an external wall and a septum separating thefirst reservoir and the second reservoir; a first closable valve influid communication with the first reservoir and the outsideenvironment; and a second closable valve in fluid communication with thesecond reservoir and the outside environment, wherein the firstreservoir is in fluid isolation from the second reservoir, wherein whenthe first reservoir and the second reservoir are in inflatedconfigurations, a first external surface of the wall adjacent to thefirst reservoir and opposite to the second reservoir is flat, and asecond external surface of the wall adjacent to the second reservoir andopposite to the first reservoir is flat and parallel to the firstexternal surface, wherein at least a portion of the first externalsurface extends continuously from a first lateral terminal end of thefirst reservoir to a second lateral terminal end of the first reservoirand continuously from a first longitudinal terminal end of the firstreservoir to a second longitudinal terminal end of the first reservoiralong the lateral extent of the first external surface of the flexiblewall defining the first reservoir, wherein at least a portion of thesecond external surface extends continuously from a first lateralterminal end of the second reservoir to a second lateral terminal end ofthe second reservoir and continuously from a first longitudinal terminalend of the second reservoir to a second longitudinal terminal end of thesecond reservoir along the lateral extent of the second external surfaceof the flexible wall defining the second reservoir, wherein the firstclosable valve is on a first reservoir terminal end of a firstlongitudinal side of the first reservoir, wherein the second closablevalve is on a second reservoir terminal end of the first longitudinalside of the second reservoir, wherein when the first reservoir and thesecond reservoir are in inflated configurations, the first reservoir hasa first reservoir central axis and the second reservoir has a secondreservoir central axis, and wherein the first reservoir central axis iscollinear with the second reservoir central axis, wherein the firstreservoir is configured to be above the second reservoir when the secondexternal surface is positioned against a floor, wherein when the firstreservoir is in an inflated configuration, the first reservoir has afirst reservoir length, a first reservoir width, and a first reservoirheight, wherein when the second reservoir is in an inflatedconfiguration, the second reservoir has a second reservoir length, asecond reservoir width, and a second reservoir height, wherein the firstreservoir length is greater than the second reservoir length, whereinthe first reservoir width is equal to or less than the second reservoirwidth, wherein the first reservoir height is less than the secondreservoir height, wherein when the first reservoir and the secondreservoir are in inflated configurations the inflatable cushion has acushion height from 15 cm to 80 cm, wherein when the first reservoir andthe second reservoir are in inflated configurations, the first externalsurface is rectangular with rounded corners and the second externalsurface is rectangular with rounded corners, wherein the first reservoirhas six internal walls, wherein the six internal walls are attached tothe septum and to the external wall forming the first external surface,wherein the six internal walls are attached to the external wall formingthe first external surface at six corresponding internal wall seams,wherein each internal wall seam extends from a first lateral side of thefirst reservoir to a second lateral side of the first reservoir, whereinthe second reservoir has a reservoir seam that extends around aperimeter of the second reservoir, wherein the second closable valve ison a third external surface of the wall on the second reservoir terminalend of the first longitudinal side of the second reservoir, wherein thethird external surface of the wall extends between the reservoir seamand the first reservoir, and wherein when the first reservoir is in aninflated configuration, the internal walls are in tension between theseptum and the external wall forming the first external surface.